Diagnostic LED Codes and Diagnostic Beep Codes for the Latitude 10 and Latitude 10 ST2E

Diagnostic LED Codes

Diagnostic LED code communicated via the Power Button LED or agreed upon alternate LED. The Power Button LED shall blink the corresponding LED codes for the corresponding fault condition. Example: No Memory detected, Power Button LED blinks two times followed by a pause, blinks two times, pause, etc. This pattern continues until the system is powered off.

LED Code

Fault Description

Suggested Remedy

1

System Board: BIOS ROM failure

System board, covers BIOS corruption or ROM error

2

Memory

No memory/RAM detected

3

System board failure

Chipset Error

Clock failure

Gate A20 failure

Super I/O failure

Keyboard controller failure

System board failure

4

Memory

Memory/RAM failure

5

Real-time clock failure

Reseat the CMOS battery connection

If the problem persists, possible battery failure or system board failure

6

Video BIOS

Video card/chip failure

7

CPU

Processor failure

8

LCD

LCD failure

Diagnostic Beep Codes

The computer may emit a series of beeps during start-up if the display cannot show errors or problems. These series of beeps, called beep codes, identify various problems. The delay between each beep is 300 ms, the delay between each set of beeps is 3 seconds, and the beep sound lasts 300 ms. After each beep and each set of beeps, the BIOS should detect if the user presses the power button. If so, BIOS will jump out from looping and execute the normal shutdown process and power system.

Beep Code

Fault Description

Suggested Remedy

1

BIOS ROM checksum in progress or failure

System board failure, covers BIOS corruption or ROM error

2

Memory

No memory/RAM detected

3

Chipset Error (North and South bridge error, DMA/IMR/Timer error)

Time-Of-Day Clock test failure

Gate A20 failure

Super I/O failure

Keyboard controller failure

System board failure

4

RAM Read/Write failure

Memory/RAM failure

5

Real-time clock power fail

Reseat the CMOS battery connection

If the problem persists, possible battery failure or system board failure

6

Video BIOS Test Failure

Video card/chip failure

7

CPU-cache test failure

Processor failure

8

LCD

LCD failure

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